The Nervous System
... to and responds to information from the central nervous systems • Neurons transmit information by – special cells that transfer messages (impulses)around the body by electrical energy • sensory neurons –collect information and send to CNS • motor neurons – respond to information sent from CNS ...
... to and responds to information from the central nervous systems • Neurons transmit information by – special cells that transfer messages (impulses)around the body by electrical energy • sensory neurons –collect information and send to CNS • motor neurons – respond to information sent from CNS ...
13. What determines the magnitude of the graded potential? (p. 240)
... communicate the electrical information to another cell. This transmission occurs via a synapse. A synapse is a junction between a neuron and a target cell, which could be another neuron, a muscle cell, or a gland. At a synapse, the axon of the presynaptic neuron passes information to receptors on th ...
... communicate the electrical information to another cell. This transmission occurs via a synapse. A synapse is a junction between a neuron and a target cell, which could be another neuron, a muscle cell, or a gland. At a synapse, the axon of the presynaptic neuron passes information to receptors on th ...
Neuro1
... (visceral efferent) has the cell bodies of its pre-ganglionic fibers somewhere in the CNS. If the fibers are sympathetic, the post-ganglionic fibers are either in different levels of the sympathetic trunk or in collateral ganglia. If the post-ganglionic autonomic fibers are parasympathetic, the cell ...
... (visceral efferent) has the cell bodies of its pre-ganglionic fibers somewhere in the CNS. If the fibers are sympathetic, the post-ganglionic fibers are either in different levels of the sympathetic trunk or in collateral ganglia. If the post-ganglionic autonomic fibers are parasympathetic, the cell ...
Part 1: True/False
... 14. Which is the strongest piece of evidence that Otto Loewi provided proving that chemical synaptic transmission exists: A. Showing that stimulating the Vagus nerve slows down the heart B. Proving that electricity could make muscles contract C. Waking up in the middle of the night and writing unint ...
... 14. Which is the strongest piece of evidence that Otto Loewi provided proving that chemical synaptic transmission exists: A. Showing that stimulating the Vagus nerve slows down the heart B. Proving that electricity could make muscles contract C. Waking up in the middle of the night and writing unint ...
Nervous System: Levels of Organization Review and
... membrane and how it is measured. Contrast the relative concentrations of ions in body solutions inside and outside of a cell (sodium, potassium, calcium and chloride ions). Explain how four factors determine a neuron’s resting membrane potential. Explain how a local electrical response in a neuron m ...
... membrane and how it is measured. Contrast the relative concentrations of ions in body solutions inside and outside of a cell (sodium, potassium, calcium and chloride ions). Explain how four factors determine a neuron’s resting membrane potential. Explain how a local electrical response in a neuron m ...
LectureTest22011, the new questions
... A. The sensory information carried by the spinothalamic and dorsal column pathways comes to our consciousness, but sensory information carried by the spinocerebellar pathway does not. B. In the dorsal column patahway, the axons of the first neurons are in the white matter of the cerebrum. C. In the ...
... A. The sensory information carried by the spinothalamic and dorsal column pathways comes to our consciousness, but sensory information carried by the spinocerebellar pathway does not. B. In the dorsal column patahway, the axons of the first neurons are in the white matter of the cerebrum. C. In the ...
P416 COMPARATIVE ANIMAL PHYSIOLOGY
... – speed at which the action potential travels down the length of an axon – dictates speed of response ...
... – speed at which the action potential travels down the length of an axon – dictates speed of response ...
Information Processing SG
... The nervous system is like an information highway. It is responsible for controlling and coordinating all the functions and movements in the body and allows you to respond to changes in your environment The nervous system is made up of _____________ that are strings of long thin cells called _______ ...
... The nervous system is like an information highway. It is responsible for controlling and coordinating all the functions and movements in the body and allows you to respond to changes in your environment The nervous system is made up of _____________ that are strings of long thin cells called _______ ...
No Slide Title
... reflex may not be produced, however if several small pinches are rapidly applied they trigger a reflex. This is called temporal summation. ...
... reflex may not be produced, however if several small pinches are rapidly applied they trigger a reflex. This is called temporal summation. ...
Developmental plasticity: Pruning
... The primary cause for loss of GM density is unknown. It may be driven at least partially by the process of synaptic pruning, together with trophic glial and vascular changes and or cell shrinkage. ...
... The primary cause for loss of GM density is unknown. It may be driven at least partially by the process of synaptic pruning, together with trophic glial and vascular changes and or cell shrinkage. ...
The human brain is a 3 pound mass of fatty tissue that controls all
... excitable output fiber, the axon. Most axons also give rise to many smaller branches before ending at nerve terminals. Synapses, from the Greek word meaning “to clasp together,” are the contact points where one neuron communicates with another. Other structures, dendrites, Greek for “tree branches,” ...
... excitable output fiber, the axon. Most axons also give rise to many smaller branches before ending at nerve terminals. Synapses, from the Greek word meaning “to clasp together,” are the contact points where one neuron communicates with another. Other structures, dendrites, Greek for “tree branches,” ...
History of the Nervous System Cells of the Nervous System
... This is where membrane potentials are summated before entering the axon ...
... This is where membrane potentials are summated before entering the axon ...
Final Exam - UF Psychology
... 5. The greater incidence of mounting behavior in male than in female rats is thought to reflect ___masculinization______________ of the brain. The lesser incidence of lordosis in male than in female rats is thought to reflect __defeminization______________ of the brain. 6. Two rapidly-adapting cutan ...
... 5. The greater incidence of mounting behavior in male than in female rats is thought to reflect ___masculinization______________ of the brain. The lesser incidence of lordosis in male than in female rats is thought to reflect __defeminization______________ of the brain. 6. Two rapidly-adapting cutan ...
Composition of the Nervous System
... The electron microscope demonstrates particularly well membranes and intracellular structure. For neurons this includes microtubules, neurofilaments, microfilaments and synaptic vesicles, synapses and relationships with glia such as myelin sheaths. The electron microscope has a limited ability to tr ...
... The electron microscope demonstrates particularly well membranes and intracellular structure. For neurons this includes microtubules, neurofilaments, microfilaments and synaptic vesicles, synapses and relationships with glia such as myelin sheaths. The electron microscope has a limited ability to tr ...
5104_a2
... Under anesthesia, removal of the sphenoid bone and dura mater exposes the ventral surface of the hypothalamus from the optic chiasm to the posterior pituitary. A stimulating electrode positioned in the posterior pituitary allows activation of axon terminals of neurosecretory neurons. A ...
... Under anesthesia, removal of the sphenoid bone and dura mater exposes the ventral surface of the hypothalamus from the optic chiasm to the posterior pituitary. A stimulating electrode positioned in the posterior pituitary allows activation of axon terminals of neurosecretory neurons. A ...
4.27.05 Respiration and Nervous
... • The action potential travels the length of an axon, with each portion of the axon undergoing depolarization then repolarization. • A refractory period ensures that the action potential will not move backwards. • In myelinated fibers, the action potential only occurs at the nodes of Ranvier. • This ...
... • The action potential travels the length of an axon, with each portion of the axon undergoing depolarization then repolarization. • A refractory period ensures that the action potential will not move backwards. • In myelinated fibers, the action potential only occurs at the nodes of Ranvier. • This ...
neurohistology
... Transport of macromolecules and organelles synthesized by cell body occurs away from soma[anterograde] and towards it [retrograde] It can be slow or fast Microtubules act as ‘railroad tracks’ for fast transport ...
... Transport of macromolecules and organelles synthesized by cell body occurs away from soma[anterograde] and towards it [retrograde] It can be slow or fast Microtubules act as ‘railroad tracks’ for fast transport ...
Andrew Rosen - Chapter 3: The Brain and Nervous System Intro
... Sensitive to activity level in each neuron and increase blood flow whenever the neurons in one area become more active Control brain development When new neurons are made during development, they migrate from one position to another, and this is controlled by glia o Glia produce chemicals to shut do ...
... Sensitive to activity level in each neuron and increase blood flow whenever the neurons in one area become more active Control brain development When new neurons are made during development, they migrate from one position to another, and this is controlled by glia o Glia produce chemicals to shut do ...
Central Nervous System
... • Inhibitory and excitatory presynaptic neurons can converge on a postsynaptic neuron – An action potential is produced at the trigger zone when the graded potential is produced as a result of the sum of the EPSPs and IPSPs reaching threshold ...
... • Inhibitory and excitatory presynaptic neurons can converge on a postsynaptic neuron – An action potential is produced at the trigger zone when the graded potential is produced as a result of the sum of the EPSPs and IPSPs reaching threshold ...
Chapter Outline
... Nervous tissue is made up of neurons (nerve cells) and neuroglia, which support and nourish the neurons. A. Neurons and Neuroglia 1. Neurons vary in appearance, depending on their function and location, but they all have three parts. a. The cell body contains the nucleus and other organelles. b. Den ...
... Nervous tissue is made up of neurons (nerve cells) and neuroglia, which support and nourish the neurons. A. Neurons and Neuroglia 1. Neurons vary in appearance, depending on their function and location, but they all have three parts. a. The cell body contains the nucleus and other organelles. b. Den ...
Dramatic Growth of Grafted Stem Cells in Rat Spinal Cord
... colleagues said the human iPSC-derived axons extended through the white matter of the injury sites, frequently penetrating adjacent gray matter to form synapses with rat neurons. Similarly, rat motor axons pierced the human iPSC grafts to form their own synapses. The iPSCs used were developed from a ...
... colleagues said the human iPSC-derived axons extended through the white matter of the injury sites, frequently penetrating adjacent gray matter to form synapses with rat neurons. Similarly, rat motor axons pierced the human iPSC grafts to form their own synapses. The iPSCs used were developed from a ...
Axon
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An axon (from Greek ἄξων áxōn, axis), also known as a nerve fibre, is a long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body. The function of the axon is to transmit information to different neurons, muscles and glands. In certain sensory neurons (pseudounipolar neurons), such as those for touch and warmth, the electrical impulse travels along an axon from the periphery to the cell body, and from the cell body to the spinal cord along another branch of the same axon. Axon dysfunction causes many inherited and acquired neurological disorders which can affect both the peripheral and central neurons.An axon is one of two types of protoplasmic protrusions that extrude from the cell body of a neuron, the other type being dendrites. Axons are distinguished from dendrites by several features, including shape (dendrites often taper while axons usually maintain a constant radius), length (dendrites are restricted to a small region around the cell body while axons can be much longer), and function (dendrites usually receive signals while axons usually transmit them). All of these rules have exceptions, however.Some types of neurons have no axon and transmit signals from their dendrites. No neuron ever has more than one axon; however in invertebrates such as insects or leeches the axon sometimes consists of several regions that function more or less independently of each other. Most axons branch, in some cases very profusely.Axons make contact with other cells—usually other neurons but sometimes muscle or gland cells—at junctions called synapses. At a synapse, the membrane of the axon closely adjoins the membrane of the target cell, and special molecular structures serve to transmit electrical or electrochemical signals across the gap. Some synaptic junctions appear partway along an axon as it extends—these are called en passant (""in passing"") synapses. Other synapses appear as terminals at the ends of axonal branches. A single axon, with all its branches taken together, can innervate multiple parts of the brain and generate thousands of synaptic terminals.